Photoluminescent Graphene Oxide Microarray for Multiplex Heavy Metal Ion Analysis

Authors

  • Fei Liu,

    1. Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
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  • Hyun Dong Ha,

    1. Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
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  • Dong Ju Han,

    1. Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
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  • Tae Seok Seo

    Corresponding author
    1. Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
    • Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.

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Abstract

original image

An aptamer-linked graphene oxide (GO) microarray is synthesized for multiplex heavy metal ion detection. Fluorescent nanosized GO sheets are micropatterned, and specific aptamers targeting Ag+ and Hg2+ are immobilized on the GO array. Upon capture of the target heavy metal ions, electron transfer occurs between the GO (donors) and the heavy metal ions (acceptors), leading to fluorescence quenching of the GO.

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